CN110100366A - Mobile terminal, peripheral equipment and its charging method - Google Patents

Mobile terminal, peripheral equipment and its charging method Download PDF

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Publication number
CN110100366A
CN110100366A CN201780079810.2A CN201780079810A CN110100366A CN 110100366 A CN110100366 A CN 110100366A CN 201780079810 A CN201780079810 A CN 201780079810A CN 110100366 A CN110100366 A CN 110100366A
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CN
China
Prior art keywords
battery
charging
mobile terminal
switch
peripheral equipment
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Granted
Application number
CN201780079810.2A
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Chinese (zh)
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CN110100366B (en
Inventor
李涛
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of CN110100366A publication Critical patent/CN110100366A/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers

Abstract

The embodiment of the present application discloses a kind of mobile terminal, peripheral equipment and its charging method, it is related to technical field of electronic equipment, mobile terminal can be independently-powered with peripheral equipment and may be implemented mutually to charge when mobile terminal is connected with peripheral equipment by connector, improves mobile terminal and cruising ability when peripheral equipment is used cooperatively.Mobile terminal, comprising: first switch, second switch, the first charging interface, the first charging circuit, the first connector, the first battery and the first electronic controller.

Description

Mobile terminal, peripheral equipment and its charging method Technical field
This application involves technical field of electronic equipment more particularly to mobile terminals, peripheral equipment and its charging method.
Background technique
Currently, tablet computer passes through built-in lithium battery to system power supply, since tablet computer on the market tends to lightening development trend.It is limited by space, the limited battery capacity (about 4000~6000mAh) of general plate, in addition screen is big, power consumption is big, the use of the time is usually 4~6 hours, when user goes out, often to carry a charger baby, endurance is still difficult to effectively obtain promotion more.And AC power source is connected using power supply adaptor, then can portability be had a greatly reduced quality.For tablet computer user when gently being handled official business, when such as being handled official business using office (office) software, dummy keyboard built in plate occupies the space that screen is shown.If arranging in pairs or groups external keyboard, the operation such as character input is carried out, more conducively user job uses.This two-in-one notebook has preferable development prospect.However, in the prior art two-in-one notebook still have in cruising ability it is to be hoisted.
Summary of the invention
Embodiments herein provides mobile terminal, peripheral equipment and its charging method, mobile terminal can be independently-powered with peripheral equipment and may be implemented mutually to charge when mobile terminal is connected with peripheral equipment by connector, improves mobile terminal and cruising ability when peripheral equipment is used cooperatively.
In order to achieve the above objectives, embodiments herein adopts the following technical scheme that
In a first aspect, providing a kind of electronic equipment, a kind of mobile terminal, comprising: first switch, second switch, the first charging interface, the first charging circuit, the first connector, the first battery and the first electronic controller；The first end of first switch connects the first charging interface, and the second end of first switch connects the first end of the first charging circuit；The first end of second switch connects the first end of the first charging circuit, and the second end of second switch connects the first connector；The second end of first charging circuit is connect with the first battery, for controlling the charging process of the first battery；First connector is for connecting peripheral equipment；The control terminal of the control terminal and second switch of first electronic controller and first switch connects, and and peripheral communications；The electricity that first electronic controller is used for the second battery of the electricity and peripheral equipment according to the first battery determines charging modes, the state of first switch and the second switch is controlled according to charging modes, and peripheral equipment sends control information with outside peripheral equipment notice charging modes outward, charging modes include: that the first battery is that the second battery charges or the second battery is the charging of the first battery.In this scenario, mobile terminal can be independently-powered with peripheral equipment and may be implemented mutually to charge when mobile terminal is connected with peripheral equipment by connector, it improves mobile terminal and cruising ability when peripheral equipment is used cooperatively, enriches product function, improve product competitiveness.
In a kind of illustrative implementation, mobile terminal further include: the first dead zone function circuit and the first low pressure difference linear voltage regulator, the first input end of first dead zone function circuit is connected to the first charging interface, and the output end of the first dead zone function circuit connects the first electronic controller；The input terminal of first low pressure difference linear voltage regulator connects the third end of the first charging circuit, the second input terminal of output end the first dead zone function circuit of the first low pressure difference linear voltage regulator；When the electricity of the first battery is less than or equal to first threshold, and when the first charging interface connection charger, the charger that the first charging interface is connected is powered by the first dead zone function circuit to the first electronic controller；When the electricity of the first battery is greater than When first threshold, the first battery is powered by the first charging circuit to the first low pressure difference linear voltage regulator, and the first low pressure difference linear voltage regulator is powered by the first dead zone function circuit to the first electronic controller.In this way, the normality that first switch may be implemented is off-state, when therefore can be realized the first charging interface of mobile terminal and being not inserted into charger, the first charging interface of mobile terminal is isolated with internal circuit, at the same mobile terminal it is exposed in normal operating conditions the first charging interface it is not charged.Since the control of first switch and the control of second switch need the first electronic controller normal power supply, when the electricity of the first battery is in low electricity condition, it cannot be the first electronic controller normal power supply, if first switch is in an off state, even if the first charging interface, which is connected to charger, to be the charging of the first battery by first switch, for the first electronic controller normal power supply.Here the first dead zone function circuit provides the access that one is the first electronic controller normal power supply, so that when the electricity of the first battery is in low electricity condition, if the first charging interface is connected to charger, the first electronic controller normal power supply is enabled to, and then controlling first switch closure is that the first battery charges.
In a kind of implementation of exemplary, first dead zone function circuit includes: buck converter BUCK circuit, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first triode, the second triode, the first MOS (Metal-Oxide-Semiconductor, Metal-oxide-semicondutor) pipe and the second metal-oxide-semiconductor；Wherein, the input terminal of BUCK circuit connects the first input end of the first dead zone function circuit, the first end of first resistor connects the first input end of the first dead zone function circuit, the end enabled EN (Enable) of the second end connection BUCK circuit of first resistor, the second end of first resistor also pass through second resistance and connect ground terminal；The end EN of BUCK circuit is also connected with the collector of the first triode, the emitter of first triode connects ground terminal, the first end of the base stage connection 3rd resistor of first triode, the second end of 3rd resistor connects the second input terminal of the first dead zone function circuit, and the second end of 3rd resistor is also connected with the first end of the 4th resistance；The output end of BUCK circuit connects the drain electrode of the first metal-oxide-semiconductor, and the source electrode of the first metal-oxide-semiconductor connects the source electrode of the second metal-oxide-semiconductor, and the grid of the first metal-oxide-semiconductor connects ground terminal by the 5th resistance, and the second end of the 4th resistance is also connected with the grid of the first metal-oxide-semiconductor；The source electrode of second metal-oxide-semiconductor connects the grid of the second metal-oxide-semiconductor by the 6th resistance, the source electrode of second metal-oxide-semiconductor connects the output end of the first dead zone function circuit, the grid of second metal-oxide-semiconductor is also connected with the collector of the second triode, second input terminal of drain electrode the first dead zone function circuit of connection of the second metal-oxide-semiconductor, the base stage of the second triode connect the second input terminal of the first dead zone function circuit by the 7th resistance.
It further include the first Schottky diode and the second Schottky diode in a kind of illustrative implementation；Wherein, the anode of the first Schottky diode connects the first charging interface, and the cathode of the first Schottky diode connects the cathode of the second Schottky diode, the second end of the anode connection second switch of the second Schottky diode；The cathode of first Schottky diode is also connected with the first input end of the first dead zone function circuit.
In a kind of illustrative implementation, mobile terminal further includes charger detection circuit in place, and charger detection circuit in place connects the first charging interface and the first electronic controller；Wherein, charger detection circuit in place is used to obtain the sampled voltage of the first charging interface, and the first electronic controller is used to determine whether the first charging interface has charger connection according to sampled voltage；When the first electronic controller determines that the first charging interface has charger to connect and/or the second charging interface of peripheral equipment has charger connection, first electronic controller is also used to redefine charging modes, charging modes further include: the charger of the first charging interface connection is that the first battery and the second battery charge, or second charging interface connection charger be the first battery and the second battery charging or the first charging interface connection charger be the first battery and the second charging interface connection charger be the second battery charging.Wherein, charger detection circuit in place includes the 8th resistance and the 9th resistance；First end the first charging interface of connection of 8th resistance, the second of the 8th resistance The first end of the 9th resistance of end connection, the second end of the 9th resistance connect ground terminal；The first end of 9th resistance connects the first electronic controller；First electronic controller is used to obtain the sampled voltage of the first end of the 9th resistance, and determines whether charging interface has charger connection according to sampled voltage.
In a kind of illustrative implementation, mobile terminal further includes to side apparatus detection circuit in place；First electronic controller and the second connector are connected to side apparatus detection circuit in place；Second connector is used to connect the ground terminal to side apparatus；When ground terminal of the second connector connection to side apparatus, the first electronic controller is in place to side apparatus according to the determination of the level of the second connector.It wherein, include the tenth resistance and eleventh resistor to side apparatus detection circuit in place；The power supply of the first end connection scheduled voltage of tenth resistance, the first end of the second end connection eleventh resistor of the tenth resistance, the second end of eleventh resistor connect ground terminal；The second end of tenth resistance is also connected with the first electronic controller and the second connector.
In a kind of illustrative implementation, first charging interface is USB (Universal Serial Bus, universal serial bus) interface, the first charging interface includes identity ID (identification) pin, and ID pin connects the first electronic controller；When OTG (On-The-Go) transfer connector is inserted into charging interface, the first electronic controller is used to determine whether the first charging interface has the insertion of OTG transfer connector according to the level of ID pin.
In a kind of illustrative implementation, first switch and/or second switch include: third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, twelfth resistor, thirteenth resistor and third transistor；The source electrode of third metal-oxide-semiconductor connects the source electrode of the 4th metal-oxide-semiconductor；The source electrode of third metal-oxide-semiconductor is also connected with the first end of twelfth resistor, grid, the grid of the 4th metal-oxide-semiconductor and the first end of thirteenth resistor of the second end connection third metal-oxide-semiconductor of twelfth resistor；The collector of the second end connection third transistor of thirteenth resistor, the emitter of third transistor connect ground terminal；When third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, twelfth resistor, thirteenth resistor and third transistor composition first switch, the first end of the drain electrode connection first switch of third metal-oxide-semiconductor, the second end of the drain electrode connection first switch of 4th metal-oxide-semiconductor, the control terminal of the base stage connection first switch of third transistor；When third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, twelfth resistor, thirteenth resistor and third transistor composition second switch, the first end of the drain electrode connection second switch of third metal-oxide-semiconductor, the second end of the drain electrode connection second switch of 4th metal-oxide-semiconductor, the control terminal of the base stage connection second switch of third transistor.
It further include current-limiting circuit in a kind of illustrative implementation, the input terminal of the current limliting pin connection current-limiting circuit of the first charging circuit, the control terminal of current-limiting circuit connects the first electronic controller；First electronic controller determines the charge power of the first battery and the charge power of the second battery according to the electricity of the first battery and the electricity of the second battery, first electronic controller controls the electric current of the current limliting pin of the first charging circuit according to the charge power of the first battery by current-limiting circuit, and the charge power of the second battery is sent to peripheral equipment, wherein the first charging circuit is corresponding with the electric current of current limliting pin to the charge power of the first battery.Wherein, current-limiting circuit includes: the 14th resistance, the 15th resistance, the 16th resistance and the 4th triode；The first end of 14th resistance connects the current limliting pin of the first charging circuit, and the second end of the 14th resistance connects the collector of the 4th triode；The first end of 15th resistance connects the current limliting pin of the first charging circuit, and the second end of the 15th resistance connects ground terminal；The grid of 4th triode connects the control terminal of current-limiting circuit by the 16th resistance, and the emitter of the 4th triode connects ground terminal.
It further include the first display module in a kind of illustrative implementation；When first electronic controller determines that the first battery is in charged state, it controls the first display module and shows that mobile terminal is in the mark of charged state, when first electronic controller determines that the first battery is in power supply state, the first display module of control shows that mobile terminal is in the mark of power supply state；When first electronic controller determines that the second battery is in charged state, the first display module of control is shown Peripheral equipment is in the mark of charged state, and when the first electronic controller determines that the second battery is in power supply state, the first display module of control shows that peripheral equipment is in the mark of power supply state.
In a kind of illustrative implementation, the first electronic controller is specifically used for determining that the electricity of the first battery of mobile terminal is lower and is lower than third threshold value, it is determined that charging modes are that the second battery is the charging of the first battery；First electronic controller is specifically used for determining that the electricity of the second battery of peripheral equipment is lower and is lower than the 4th threshold value, it is determined that charging modes are that the first battery is the charging of the second battery.
In a kind of illustrative implementation, when the first battery is that the second battery charges, if the first electronic controller determines the electricity of the first battery lower than the 5th threshold value, for controlling second switch disconnection, and outward, peripheral equipment transmission stops charge control instruction to the first electronic controller.
In a kind of illustrative implementation, when the second battery is that the first battery charges, if the first electronic controller determines the electricity of the second battery lower than the 6th threshold value, for controlling second switch disconnection, and outward, peripheral equipment transmission stops power supply control instruction to the first electronic controller.
In a kind of illustrative implementation, the first connector is pogo pin spring ejector pin connector.
Second aspect provides a kind of peripheral equipment, including third switch, the 4th switch, the second charging interface, the second charging circuit, third connector, the second battery and the second electronic controller；The first end of third switch connects the second charging interface, the first end of the second end connection and the second charging circuit of third switch；The first end of 4th switch connects the first end of the second charging circuit, and the second end of the 4th switch connects third connector；The second end of second charging circuit is connect with the second battery, for controlling the charging process of the second battery；Third connector is for connecting mobile terminal；Second electronic controller is connect with the control terminal of control terminal and the 4th switch that third switchs, and and communication of mobile terminal；The control information that second electronic controller is used to be sent according to mobile terminal determines charging modes, and the state of third switch and the 4th switch is controlled according to charging modes, charging modes include: that the second battery is that the first battery charges or the first battery is the charging of the second battery.In this scenario, mobile terminal can be independently-powered with peripheral equipment and may be implemented mutually to charge when mobile terminal is connected with peripheral equipment by connector, it improves mobile terminal and cruising ability when peripheral equipment is used cooperatively, enriches product function, improve product competitiveness.
In a kind of illustrative implementation, peripheral equipment further include: the second dead zone function circuit and the second low pressure difference linear voltage regulator；The first input end of second dead zone function circuit is connected to the second charging interface, and the output end of the second dead zone function circuit connects the second electronic controller；The input terminal of second low pressure difference linear voltage regulator connects the third end of the second charging circuit, the second input terminal of output end the second dead zone function circuit of the second low pressure difference linear voltage regulator；When the electricity of the second battery is less than or equal to second threshold, and when the second charging interface connection charger, the charger that the second charging interface is connected is powered by the second dead zone function circuit to the second electronic controller；When the electricity of the second battery is greater than second threshold, the second battery is powered by the second charging circuit to the second low pressure difference linear voltage regulator, and the second low pressure difference linear voltage regulator is powered by the second dead zone function circuit to the second electronic controller.In this way, the normality that third switch may be implemented is off-state, when therefore can be realized the second charging interface of mobile terminal and being not inserted into charger, the second charging interface of mobile terminal is isolated with internal circuit, at the same mobile terminal it is exposed in normal operating conditions the second charging interface it is not charged.Since the control of third switch and the control of the 4th switch need the second electronic controller normal power supply, when the electricity of the second battery is in low electricity condition, it cannot be the second electronic controller normal power supply, if third switch is in an off state, even if it is that the second battery charges that the second charging interface, which is connected to charger and can not be switched by third normally, for the second electronic controller normal power supply.Here the second dead zone function circuit provides the access that one is the second electronic controller normal power supply, so that when the electricity of the second battery is in low electricity condition, if the second charging Mouth connection charger, enables to the second electronic controller normal power supply, and then controls third and close the switch as the charging of the second battery.
It further include the second display module in a kind of illustrative implementation；When second electronic controller determines that the first battery is in charged state, it controls the second display module and shows that mobile terminal is in the mark of charged state, when second electronic controller determines that the first battery is in power supply state, the second display module of control shows that mobile terminal is in the mark of power supply state；When second electronic controller determines that the second battery is in charged state, it controls the second display module and shows that peripheral equipment is in the mark of charged state, when second electronic controller determines that the second battery is in power supply state, the second display module of control shows that peripheral equipment is in the mark of power supply state.
In a kind of illustrative implementation, the second electronic controller is also used to receive the stopping charge control instruction of mobile terminal transmission, and disconnects according to the 4th switch of charge control instruction control is stopped.
In a kind of illustrative implementation, the second electronic controller is also used to receive the stopping power supply control instruction of mobile terminal transmission, and disconnects according to the 4th switch of power supply control instruction control is stopped.
The third aspect provides a kind of charging method of mobile terminal, includes the following steps: that mobile terminal determines charging modes according to the electricity of the electricity of the first battery of mobile terminal and the second battery of peripheral equipment；Mobile terminal controls the state of first switch and the second switch according to charging modes, and peripheral equipment sends control information with outside peripheral equipment notice charging modes outward, charging modes include: that the second battery charging that the first battery is peripheral equipment or the second battery charge for the first battery.In this scenario, mobile terminal can be independently-powered with peripheral equipment and may be implemented mutually to charge when mobile terminal is connected with peripheral equipment by connector, it improves mobile terminal and cruising ability when peripheral equipment is used cooperatively, enriches product function, improve product competitiveness.
In a kind of illustrative implementation, mobile terminal determines whether the first charging interface has charger connection according to the sampled voltage of the first charging interface of mobile terminal；When mobile terminal determines that the first charging interface of mobile terminal has charger to connect and/or the second charging interface of peripheral equipment has charger connection, redefine charging modes, charging modes further include: the charger of the first charging interface connection is that the first battery and the second battery charge, or it is the charging of the second battery that the charger of the second charging interface connection of peripheral equipment, which is the charger that the first battery and the second charging interface connect for the charger of the first battery and the charging of the second battery or the connection of the first charging interface,.
In a kind of illustrative implementation, mobile terminal is according to the electricity of the electricity of the first battery of mobile terminal and the second battery of peripheral equipment, it determines the charge power of the first battery and the charge power of the second battery, and the charge power of the second battery is sent to peripheral equipment.
In a kind of illustrative implementation, method further include: when mobile terminal determines that the first battery is in charged state, display mobile terminal is in the mark of charged state, and when mobile terminal determines that the first battery is in power supply state, display mobile terminal is in the mark of power supply state；When mobile terminal determines that the second battery is in charged state, display peripheral equipment is in the mark of charged state, and when mobile terminal determines that the second battery is in power supply state, display peripheral equipment is in the mark of power supply state.
In a kind of illustrative implementation, mobile terminal determines charging modes according to the electricity of the electricity of the first battery of mobile terminal and the second battery of peripheral equipment, it include: that mobile terminal determines that the electricity of the first battery of mobile terminal is lower and is lower than third threshold value, it is determined that charging modes are that the second battery is the charging of the first battery；Alternatively,
Mobile terminal determines that the electricity of the second battery of peripheral equipment is lower and is lower than the 4th threshold value, it is determined that charging modes are that the first battery is the charging of the second battery.
In a kind of illustrative implementation, when the first battery is that the second battery charges, if mobile terminal determines The electricity of first battery is lower than the 5th threshold value, then mobile terminal control second switch disconnects, and peripheral equipment transmission stops charge control instruction outward.
In a kind of illustrative implementation, when the second battery is that the first battery charges, if mobile terminal determines the electricity of the second battery lower than the 6th threshold value, mobile terminal controls second switch and disconnects, and peripheral equipment sends and stops power supply control instruction outward.
Fourth aspect provides a kind of charging method of peripheral equipment, comprising: the control information that peripheral equipment is sent according to mobile terminal determines charging modes；Peripheral equipment controls the state of third switch and the 4th switch according to charging modes, and charging modes include: that the second battery is that the first battery charges or the first battery is the charging of the second battery.In this scenario, mobile terminal can be independently-powered with peripheral equipment and may be implemented mutually to charge when mobile terminal is connected with peripheral equipment by connector, it improves mobile terminal and cruising ability when peripheral equipment is used cooperatively, enriches product function, improve product competitiveness.
In a kind of illustrative implementation, when peripheral equipment determines that the first battery is in charged state, display mobile terminal be in the mark of charged state, when peripheral equipment determines that the first battery is in power supply state, shows that mobile terminal is in the mark of power supply state；When peripheral equipment determines that the second battery is in charged state, display peripheral equipment is in the mark of charged state, and when peripheral equipment determines that the second battery is in power supply state, display peripheral equipment is in the mark of power supply state.
In a kind of illustrative implementation, peripheral equipment receives the stopping charge control instruction that mobile terminal is sent, and disconnects according to the 4th switch of charge control instruction control is stopped.
In a kind of illustrative implementation, peripheral equipment receives the stopping power supply control instruction that mobile terminal is sent, and disconnects according to the 4th switch of power supply control instruction control is stopped.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, the drawings to be used in the description of the embodiments or prior art will be briefly described below.
Fig. 1 is a kind of schematic diagram for application scenarios that embodiments herein provides；
Fig. 2 is the schematic diagram for the another application scene that embodiments herein provides；
Fig. 3 is a kind of connected mode schematic diagram for connector that embodiments herein provides；
Fig. 4 is the structural schematic diagram of a kind of mobile terminal and peripheral equipment that embodiments herein provides；
Fig. 5 is the structural schematic diagram of a kind of mobile terminal and peripheral equipment that another embodiment of the application provides；
Fig. 6 is the structural schematic diagram of a kind of mobile terminal and peripheral equipment that the another embodiment of the application provides；
Fig. 7 is a kind of structural schematic diagram for mobile terminal that the another embodiment of the application provides；
Fig. 8 is a kind of structural schematic diagram for switch that embodiments herein provides；
Fig. 9 is the structural schematic diagram for the charger chip that the first charging circuit of one kind that embodiments herein provides uses；
Figure 10 is the structural schematic diagram for the first current-limiting circuit of one kind that embodiments herein provides；
Figure 11 is the display interface schematic diagram on a kind of mobile terminal that embodiments herein provides；
Figure 12 is the display interface schematic diagram on a kind of mobile terminal that another embodiment of the application provides；
Figure 13 is the display interface schematic diagram on a kind of mobile terminal that the another embodiment of the application provides；
Figure 14 is a kind of charging control logic schematic diagram that embodiments herein provides.
Specific embodiment
With reference to the accompanying drawing, embodiments herein is described.
Embodiments herein is related to the peripheral equipment of mobile terminal and mobile terminal, mobile terminal may include mobile phone, tablet computer, PDA (Personal Digital Assistant, personal digital assistant), POS (Point of Sales, point-of-sale terminal), vehicle-mounted computer etc..The components such as mobile terminal may include, RF (Radio Frequency, radio frequency) circuit, memory, other input equipments, display screen, sensor, voicefrequency circuit, I/O subsystem, processor, charging management chip and power management chip.Mobile terminal can also include the components such as camera, bluetooth module, virtual key, physical button, and details are not described herein.It will be understood by those skilled in the art that the structure of above-mentioned mobile terminal does not constitute restriction, it may include more or fewer components, perhaps combine certain components and perhaps split certain components or different component layouts.Skilled person is understood that display screen belongs to user interface (UI, User Interface), and mobile phone may include than diagram or less user interface.In the mobile terminal course of work, the battery in mobile terminal can be powered for the above component.Peripheral equipment may is that keyboard, docking station, VR (Virtual Reality, virtual reality) glasses etc., and peripheral equipment also has battery, and the battery in peripheral equipment can be powered for peripheral equipment.
In the embodiment of the present application, the mobile terminal and its peripheral equipment provided includes battery, and when mobile terminal and its peripheral equipment connection, and in a kind of example, the first battery of mobile terminal can charge for the second battery of peripheral equipment；In another example, the second battery of peripheral equipment can charge for the first battery of mobile terminal.Furthermore, when mobile terminal connects charger, the charger that can also be connected by mobile terminal is that the first battery of mobile terminal and the second battery of peripheral equipment charge simultaneously, certainly when peripheral equipment connects charger, the charger that can also be connected by peripheral equipment is that the first battery of mobile terminal and the second battery of peripheral equipment charge simultaneously.In addition, mobile terminal and peripheral equipment can also connect alone charger, charge for respective battery.
In the examples below, can be using mobile terminal as tablet computer, peripheral equipment meets tablet computer to the increasing requirement of cruising ability to be described in detail for keyboard.It should be understood that between other mobile terminals and peripheral equipment, such as mobile phone and docking station, it also can be applied to the usage scenario of the embodiment of the present application.
In one implementation, keyboard uses Wireless Keyboard, and Wireless Keyboard and tablet computer need to be separately provided power supply, independently-powered, when one of them electricity exhausts, just cannot be used continuously.It is that keyboard is powered by tablet computer in another existing way, in which, keyboard can only link together in the two and could use, can not the seperated operation big heavy discount of ease for use.And in the application, the mobile terminal and peripheral equipment that embodiments herein provides can be independently-powered, and may be implemented mutually to charge when two equipment (such as tablet computer with keyboard) are connected by hardware connector.
Specifically, embodiments herein is illustrated especially by the interaction between tablet computer PAD and keyboard KB.As shown in figure 1, the application scenarios of the application can be with are as follows: tablet computer PAD seperated with keyboard KB can be used, wherein tablet computer PAD and the equal built-in power of keyboard KB (battery), in fission in use, tablet computer PAD and keyboard KB can pass through communicating wireless signals.Furthermore, referring to shown in Fig. 2, tablet computer PAD and keyboard KB can also be applied in combination, tablet computer PAD is electrically connected and is communicated by hardware connector (pogo pin connector 11 and electrode disk 12) with keyboard KB when being applied in combination, and tablet computer PAD and keyboard KB can be electrically connected by pogo pin connector in the application.Wherein, when the connector being arranged on tablet computer PAD is pogo pin connector, the connector being arranged on keyboard KB is electrode disk, Huo Zhejian When the connector being arranged on disk KB is pogo pin connector, the connector being arranged on tablet computer PAD is electrode disk.In the example that Fig. 1 is provided, the connector being arranged on keyboard KB is pogo pin connector 11, and the connector being arranged on tablet computer PAD is electrode disk 12.As shown in Fig. 2, when tablet computer PAD and keyboard KB are attached together with certain positional relationship, pogo pin connector is electrically connected with corresponding electrode disk, so that tablet computer PAD and keyboard KB forms connection relationship；Wherein, as shown in Figure 3, pogo pin is a kind of spring probe formed later by tri- needle shaft a, spring b, needle tubing c basic element of character by the precompressed of precision instrument riveting in the program, there is an accurate spring structure inside it, pogo pin has good anticorrosive property, stability, durability.Wherein, pogo pin connector Co1 refers to the head forceful contact electrode plate of spring probe with corresponding electrode disk Co2 electrical connection, and tablet computer PAD and keyboard KB is enabled to carry out signal transmission by the connection relationship that electrode disk and pogo pin connector are formed, certain signal is not limited to: current signal, voltage signal, data-signal etc..
Referring to shown in Fig. 4, the mobile terminal 10 that embodiments herein provides includes: first switch S1, second switch S2, the first charging interface Ch1, the first charging circuit CI1, the first connector Co1, the first battery Ba1 and the first electronic controller EC1.
Wherein, each structure connection relationship that above-mentioned mobile terminal 10 includes is as follows:
The first end of first switch S1 connects the first charging interface Ch1, and the second end of first switch S1 connects the first end of the first charging circuit CI1；The first end of second switch S2 connects the first end of the first charging circuit CI1, and the second end of second switch S2 connects the first connector Co1；The second end of first charging circuit CI1 is connect with the first battery Ba1, for controlling the charging process of the first battery Ba1；First connector Co1 is for connecting peripheral equipment 20；First electronic controller EC1 is connect with the control terminal Ko2 of the control terminal Ko1 of first switch S1 and second switch S2, and is communicated with peripheral equipment 20.
Referring to shown in Fig. 4, the peripheral equipment 20 that embodiments herein provides includes third switch S3, the 4th switch S4, the second charging interface Ch2, the second charging circuit CI2, third connector Co3, the second battery Ba2 and the second electronic controller EC2.
Wherein, each structure connection relationship that above-mentioned peripheral equipment 20 includes is as follows:
The first end of third switch S3 connects the second charging interface Ch2, the first end of the second end connection and the second charging circuit CI2 of third switch S3；The first end of 4th switch S4 connects the first end of the second charging circuit CI2, and the second end of the 4th switch S4 connects third connector Co3；The second end of second charging circuit CI2 is connect with the second battery Ba2, for controlling the charging process of the second battery Ba2；Third connector Co3 is for connecting mobile terminal 10；Second electronic controller EC2 is connect with the control terminal Ko4 of the control terminal Ko3 of third switch S3 and the 4th switch S4, and is communicated with mobile terminal 10.
Functionally, the electricity that first electronic controller EC1 is used for the second battery Ba2 of the electricity and peripheral equipment 20 according to the first battery Ba1 determines charging modes, the state of first switch S1 and second switch S2 are controlled according to charging modes, and peripheral equipment 20 sends control information with outside peripheral equipment 20 notice charging modes outward；Second electronic controller EC2 is used to determine charging modes according to the control information that mobile terminal 10 is sent, and the state of third switch S3 and the 4th switch S4 are controlled according to charging modes.Charging modes include: that the first battery Ba1 is that the second battery Ba2 charges or the second battery Ba2 is the first battery Ba1 charging.
When being applied in scene as shown in Figure 2 above, as shown in figure 4, the third connector Co3 of the first connector Co1 and keyboard KB of tablet computer PAD is electrically connected；The of the second switch S2 of tablet computer PAD Two ends are electrically connected with the second end of the 4th switch S4 of keyboard KB, wherein, when charging modes use the first battery Ba1 to charge for the second battery Ba2, first electronic controller EC1 is closed according to the second switch S2 that charging modes control tablet computer PAD, and the second electronic controller EC2 is closed according to the 4th switch S4 of charging modes control keyboard KB；Similarly, when charging modes use the second battery Ba2 to charge for the first battery Ba1, first electronic controller EC1 is closed according to the second switch S2 that charging modes control tablet computer PAD, and the second electronic controller EC2 is closed according to the 4th switch S4 of charging modes control keyboard KB.
In the case where tablet computer PAD and keyboard KB do not use charger: the first switch S1 of the first electronic controller EC1 control tablet computer PAD of tablet computer PAD is disconnected, and the third switch S3 of the first electronic controller EC1 control keyboard KB of keyboard KB is disconnected.It can be charged in this way to avoid the first charging interface Ch1 and the second charging interface Ch2.
First battery Ba1 is the path of the second battery Ba2 charging are as follows: the first charging circuit of the battery Ba1- > first CI1- > charging circuit of switch S4- > second battery of CI2- > second of second switch S2- > the 4th Ba2；At this point, the first charging circuit CI1 work of the PAD of tablet computer, in reversed boost (boosting) mode, the second charging circuit CI2 of keyboard KB works in BUCK (decompression) mode.Second battery Ba2 is the path of the first battery Ba1 charging are as follows: the second charging circuit of battery Ba2- > second switch of CI2- > the 4th S4- > charging circuit of second switch S2- > first battery of CI1- > first Ba1；At this point, the second charging circuit CI2 work of keyboard KB, in reversed boost mode, the first charging circuit CI1 of the PAD of tablet computer works in BUCK mode.
In addition, to realize the control to above-mentioned each switch, the upper first electronic controller EC1 of tablet computer PAD can detect the electricity of the first battery Ba1 by the first charging circuit CI1；On certain keyboard KB, the second electronic controller EC2 can detect the electricity of the second battery Ba2 by the second charging circuit CI2.And, first electronic controller EC1 may be implemented to be in communication with each other with the second electronic controller EC2, this communication can be wireless communication or wire communication, such as, EC1 and EC2 can be connected with each other by least one connector, or bluetooth or infrared or NFC (Near Field Communication, wireless near field communication) connection are established between EC1 and EC2；First electronic controller EC1 can receive as master controller as the information reported from the second electronic controller EC2 of controller, and the first electronic controller EC1 can send control information to the second electronic controller EC2.Such as, when tablet computer PAD and keyboard KB pass through interconnection, the EC2 of the EC1 and keyboard KB of the PAD of tablet computer can realize data communication by usb protocol, such as two pairs of connectors are set between the EC2 of the EC1 and keyboard KB of the PAD of tablet computer, it is respectively used to the transmission of a pair of of differential signal (D+ and D-) of USB.
First electronic controller EC1 is specifically used for determining that the electricity of the first battery Ba1 is lower and is lower than third threshold value, it is determined that charging modes are that the second battery Ba2 is the first battery Ba1 charging；First electronic controller EC1 is specifically used for determining that the electricity of the second battery Ba2 is lower and is lower than the 4th threshold value, it is determined that charging modes are that the first battery Ba1 is the second battery Ba2 charging.During the charging process, such as: when the first battery Ba1 is that the second battery Ba2 charges, if the first electronic controller EC1 determines the electricity of the first battery Ba1 lower than the 5th threshold value, then the first electronic controller EC1 is for controlling second switch K2 disconnection, and sends to keyboard KB and stop charge control instruction.Second electronic controller EC2 is used to receive the stopping charge control instruction of tablet computer PAD transmission, and disconnects according to the 4th switch S4 of charge control instruction control is stopped.When the second battery Ba2 is that the first battery Ba1 charges, if the first electronic controller EC1 determines the electricity of the second battery Ba2 lower than the 6th threshold value, the first electronic controller EC1 is sent out for controlling second switch S2 disconnection, and to keyboard KB It send and stops power supply control instruction.Second electronic controller EC2 is also used to receive the stopping power supply control instruction of tablet computer PAD transmission, and disconnects according to the 4th switch K4 of power supply control instruction control is stopped.
In this scenario, in this scenario, mobile terminal can be independently-powered with peripheral equipment and may be implemented mutually to charge when mobile terminal is connected with peripheral equipment by connector, improve mobile terminal and cruising ability when peripheral equipment is used cooperatively, product function is enriched, product competitiveness is improved.
In addition, referring to Figure 5, when using charger: tablet computer PAD further include: the first charger detection circuit 51 in place, the first charger detection circuit 51 in place connect the first charging interface Ch1 and the first electronic controller EC1；Wherein, the first charger detection circuit 51 in place is used to obtain the sampled voltage of the first charging interface Ch1, and the first electronic controller EC1 is used to determine whether the first charging interface Ch1 has charger connection according to sampled voltage.Illustratively, the pressure voltage for realization sampled voltage and the first electronic controller EC1 matches, and avoids sampled voltage excessively high and damages the first electronic controller EC1, provides a kind of specific structure of first charger detection circuit 51 in place:
As shown in fig. 6, the first charger detection circuit 51 in place includes the 8th resistance R8 and the 9th resistance R9；The first end of 8th resistance R8 connects the first charging interface Ch1, and the second end of the 8th resistance R9 connects the first end of the 9th resistance R8, and the second end of the 9th resistance R9 connects ground terminal GND；The first end of 9th resistance R9 connects the first electronic controller CE1；First electronic controller CE1 is used to obtain the sampled voltage of the first end of the 9th resistance R9, and determines whether charging interface has charger connection according to sampled voltage.Such as, when no charger is inserted into the first charging interface Ch1, EC1 detects the level and GND equipotential of R9 first end, when there is charger to be inserted into the first charging interface Ch1, EC1 detects that the level of R9 first end is the partial pressure for the power supply that resistance R9 provides charger, and the detection in place of charger may be implemented based on this EC1.
Furthermore, keyboard KB also has the second charger detection circuit 52 in place, similar with tablet computer PAD which is not described herein again for its specific structure and connection type, wherein the second electronic controller CE2 can also determine whether keyboard KB has charger connection according to the sampled voltage of the second charger detection circuit 52 in place of keyboard KB, and notify the first electronic controller CE1.In this way, the first electronic controller CE1 can learn whether tablet computer PAD and keyboard KB have charger connection.
When the first electronic controller EC1 determines that the first charging interface Ch1 has charger to connect and/or the second charging interface Ch2 of keyboard KB has charger connection, first electronic controller EC1 is also used to redefine charging modes, charging modes further include: the charger of the first charging interface Ch1 connection is that the first battery Ba1 and the second battery Ba2 charges, or second the charger of charging interface Ch1 connection be that the first battery Ba1 and the second battery Ba2 charge, or first charging interface Ch1 connection charger be the first battery Ba1 and the charger of the second charging interface Ch2 connection be the second battery Ba2 charging.
Charging modes are when the charger of the first charging interface Ch1 connection being used to charge for the first battery Ba1 and the second battery Ba2, first electronic controller EC1 controls first switch S1 and second switch S2 according to charging modes and is closed, and the second electronic controller EC2 is disconnected according to charging modes the 4th switch S4 of control closure, control third switch S3；Charging modes are when the charger of the second charging interface Ch1 connection being used to charge for the first battery Ba1 and the second battery Ba2, first electronic controller EC1 controls first switch S1 disconnection according to charging modes, second switch S2 is closed, and the second electronic controller EC2 controls third switch S3 and the 4th switch S4 according to charging modes and is closed.
In addition, the first charging interface Ch1 can include but is not limited to: USB (Universal Serial Bus, Universal serial bus), HDMI (High Definition Multimedia Interface, high-definition multimedia interface), URAT (Universal Asynchronous Receiver/Transmitter, universal asynchronous receiving-transmitting transmitter) etc. expansion interfaces, following scheme be illustrated by taking USB as an example；Second charging interface Ch2 can include but is not limited to: the expansion interfaces such as USB, HDMI, URAT, following scheme are illustrated by taking USB as an example.
It can specifically include following two using the scheme that charger charges:
Scheme one: the USB interface of tablet computer is inserted into charger, first switch S1 and second switch the S2 closure of the EC1 control tablet computer PAD of tablet computer PAD, the 4th switch S4 of the EC2 control keyboard KB of keyboard KB is closed, and the third switch S3 of the EC2 control keyboard KB of keyboard KB is disconnected:
The path 1 of charging are as follows: the first battery Ba1 of the first charging circuit CI1- > tablet computer PAD of first switch S1- > tablet computer PAD of charger -> tablet computer PAD USB interface -> tablet computer PAD；
The path 2 of charging are as follows: the second battery Ba2 of the 4th switch S4- of second switch S2- > keyboard KB > keyboard KB the second charging circuit Ch2- > keyboard KB of first switch S1- > tablet computer PAD of charger -> tablet computer PAD USB interface -> tablet computer PAD.
Scheme two: the USB interface of keyboard is inserted into charger, the second switch S2 closure of the EC1 control tablet computer PAD of tablet computer PAD, the first switch S1 of the EC1 control tablet computer PAD of tablet computer PAD is disconnected, third switch S3 and the 4th switch the S4 closure of the EC2 control keyboard KB of keyboard KB:
The path 1 of charging are as follows: the second battery Ba2 of charger -> keyboard KB USB interface -> keyboard KB third switch S3- > keyboard KB the second charging circuit Ch2- > keyboard KB；
The path 2 of charging are as follows: the first battery Ba1 of the first charging circuit Ch1- > tablet computer PAD of second switch S2- > tablet computer PAD of charger -> keyboard KB USB interface -> keyboard KB third switch S3- > keyboard KB the 4th switch S4- > tablet computer PAD.
When the USB interface of the USB interface of tablet computer and keyboard is inserted into charger, the second switch S2 that the EC1 of tablet computer PAD also can control tablet computer PAD is disconnected, first switch S1 is closed, the 4th switch S4 of the EC2 control keyboard KB of keyboard KB is disconnected, third switch S3 is closed, the two charges respectively, even if certain USB interface of tablet computer and the USB interface of keyboard are inserted into charger, it can also charge in such a way that above scheme one or scheme two provide only with a charger.In this way, the connection between tablet computer PAD and keyboard KB only by the first connector and third connector can realize above-mentioned five kinds of charging modes, the reliability that equipment mutually charges is improved, the connection structure of equipment room is simplified.
Furthermore as shown in figure 5, tablet computer PAD further include: the first dead zone function circuit 53 and the first low pressure difference linear voltage regulator LDO1；
The first input end of first dead zone function circuit 53 is connected to the first charging interface Ch1, and the output end of the first dead zone function circuit 53 connects the first electronic controller CE1；The input terminal of first low pressure difference linear voltage regulator LDO1 connects the third end of the first charging circuit CI1, the second input terminal of the first dead zone function of output end circuit 53 of the first low pressure difference linear voltage regulator LDO1；When the electricity of the first battery Ba1 is less than or equal to first threshold, and when the first charging interface Ch1 connection charger, the charger that the first charging interface Ch1 is connected is powered by the first dead zone function circuit 53 to the first electronic controller CE1；When the electricity of the first battery Ba1 is greater than first threshold, first battery Ba1 is powered by the first charging circuit CI to the first low pressure difference linear voltage regulator LDO1, and the first low pressure difference linear voltage regulator LDO1 is supplied by the first dead zone function circuit 53 to the first electronic controller CE1 Electricity.
Equally, as shown in figure 5, keyboard KB further include: the second dead zone function circuit 54 and the second low pressure difference linear voltage regulator LDO2；The first input end of second dead zone function circuit 54 is connected to the second charging interface Ch2, and the output end of the second dead zone function circuit 54 connects the second electronic controller EC2；The input terminal of second low pressure difference linear voltage regulator LDO2 connects the third end of the second charging circuit CI2, the second input terminal of the second dead zone function of output end circuit 54 of the second low pressure difference linear voltage regulator LDO2；When the electricity of the second battery Ba2 is less than or equal to second threshold, and when the second charging interface Ch2 connection charger, the charger that the second charging interface Ch2 is connected is powered by the second dead zone function circuit 54 to the second electronic controller CE2；When the electricity of the second battery Ba2 is greater than second threshold, second battery Ba2 is powered by the second charging circuit CI2 to the second low pressure difference linear voltage regulator LDO2, and the second low pressure difference linear voltage regulator LDO2 is powered by the second dead zone function circuit 54 to the second electronic controller EC2.
As shown in fig. 7, the first dead zone function circuit 53 includes buck converter BUCK circuit 531, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the first triode Q1, the second triode Q2, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2；Wherein, the input terminal of BUCK circuit connects the first input end of the first dead zone function circuit, the first end of first resistor connects the first input end of the first dead zone function circuit, the enabled end EN of the second end connection BUCK circuit of first resistor, the second end of first resistor also pass through second resistance and connect ground terminal；The end EN of BUCK circuit is also connected with the collector of the first triode, the emitter of first triode connects ground terminal, the first end of the base stage connection 3rd resistor of first triode, the second end of 3rd resistor connects the second input terminal of the first dead zone function circuit, and the second end of 3rd resistor is also connected with the first end of the 4th resistance；The output end of BUCK circuit connects the drain electrode of the first metal-oxide-semiconductor, and the source electrode of the first metal-oxide-semiconductor connects the source electrode of the second metal-oxide-semiconductor, and the grid of the first metal-oxide-semiconductor connects ground terminal by the 5th resistance, and the second end of the 4th resistance is also connected with the grid of the first metal-oxide-semiconductor；The source electrode of second metal-oxide-semiconductor connects the grid of the second metal-oxide-semiconductor by the 6th resistance, the source electrode of second metal-oxide-semiconductor connects the output end of the first dead zone function circuit, the grid of second metal-oxide-semiconductor is also connected with the collector of the second triode, second input terminal of drain electrode the first dead zone function circuit of connection of the second metal-oxide-semiconductor, the base stage of the second triode connect the second input terminal of the first dead zone function circuit by the 7th resistance.
The second dead zone function circuit 54 of keyboard KB and the structure of the first dead zone function circuit 53 of tablet computer PAD are identical, as shown, repeating no more.
In addition, as shown in fig. 7, tablet computer PAD further include: further include the first Schottky diode SCK1 and the second Schottky diode SCK2；Wherein, the cathode that the anode of the first Schottky diode SCK1 connects the first charging interface Ch1, the first Schottky diode SCK2 connects the cathode of the second Schottky diode SCK2, the second end of the anode connection second switch S2 of the second Schottky diode SCK2；The cathode of first Schottky diode SCK1 is also connected with the first input end of the first dead zone function circuit 53.
Wherein, the working principle of the first dead zone function circuit 53 is as follows: in order to realize that the first exposed charging interface Ch1 is not charged, first switch S1 default is in an off state.When the first battery is depleted (electricity of the first battery is less than first threshold), when the first charging interface Ch1 is inserted into charger, electric energy can not be transmitted to battery.Because first switch S1 need EC1 control could be converted between disconnection and closure, when the first battery Ba1 is depleted at this time can not be EC1 normal power supply, can not activation system, the state of first switch S1 cannot be changed.The first dead zone function circuit 53 is arranged in embodiments herein, fills as shown in figure 4, working as first When electrical interface Ch1 has charger insertion, start the first dead zone function circuit 53 immediately, power to EC1, EC1 is closed first switch S1, and charger, to the first battery Ba1 charging is stored, makes the first battery Ba1 restore electricity by the first charging circuit CI1.The working principle of the second dead zone function circuit 53 is similar to the above on keyboard KB repeats no more.
By taking the first dead zone function of tablet computer PAD circuit 53 as an example, the particular circuit configurations referring to shown in figure are as follows to its function declaration:
Actual conditions are there are problem, i.e. when S1 is disconnected, and when the first battery Ba1 electricity is less than first threshold, the first charging interface Ch1 is inserted into charger, cannot charge to the first battery Ba1, system can not start at this time.The purpose that the first dead zone function circuit 53 is arranged is, powers for EC1 and then S1 is closed, and charger can be powered to the first battery Ba1.Realization process are as follows:
When the first battery Ba1 low battery (being lower than first threshold), the output 3.3Vsys1=0V of LDO1 disconnects Q1.After first charging interface Ch1 is inserted into charger, the end EN is high level (end the EN high level of BUCK circuit is enabled, low level does not enable), and EN enables BUCK circuit 531, and electric current is powered by flowing through the first Schottky diode SCK1 to BUCK circuit 531.M1 conducting, M2 are disconnected, and electric current flows to EC1 by M1, and S1 is connected according to above-mentioned charging modes after powering on by EC1.The first charging circuit CI1 that charger passes through charges to the first battery Ba1, while powering to LDO1, and output 3.3Vsys1=3.3V, the Q1 conducting of LDO1, is connected the end EN with ground terminal GND, closes BUCK circuit 531 and M1 later.At this point, Q2 base stage conducts, the grid of M2 is connected with ground terminal GND, M2 conducting, the output voltage 3.3Vsys1 of LDO1 passes sequentially through M2 and powers to EC1.To sum up, the dead zone function of tablet computer PAD is realized.The dead zone function of keyboard KB is identical to be repeated no more.Wherein M1 and M2 is PMOS tube, and GS (Gate/Source, gate/source) both ends pressure difference has negative pressure to realize conducting, and the both ends GS pressure difference is identical, that is, realizes shutdown.GS voltage parasitic diode plays a part of to prevent electric current from flowing backward.
Furthermore, there may be align inaccurate or inconsistent phenomenon when being connected due to tablet computer PAD with keyboard KB, tablet computer PAD and keyboard KB not can be carried out communication at this time, in the scheme that embodiments herein provides, referring to Figure 5, tablet computer PAD further includes first pair of side apparatus detection circuit 55 in place；First pair of side apparatus detection circuit 55 in place connects the first electronic controller EC1 and the second connector Co2；Second connector Co2 is used to connect the ground terminal of keyboard KB, and the ground terminal of keyboard KB connects the 4th connector Co4 herein；When the second connector Co2 is connect with the 4th connector Co4, when the ground terminal of the second connector Co2 connection keyboard KB, the first electronic controller EC1 determines that keyboard KB is in place according to the level of the second connector Co2.
As shown in fig. 6, first pair of side apparatus detection circuit 55 in place includes the tenth resistance R10 and eleventh resistor R11；The first end of the second end connection eleventh resistor R11 of the power supply VCC of the first end connection scheduled voltage of tenth resistance R10, the tenth resistance R10, the second end of eleventh resistor R11 connect ground terminal GND；The second end of tenth resistance R10 is also connected with the first electronic controller EC1 and the second connector Co2.
When tablet computer PAD is not connect with keyboard KB under normal circumstances in this way, R10 and R11 divide power supply, second end of the EC1 in the tenth resistance R10 is able to detect that scheduled voltage, and when tablet computer PAD is connect with keyboard KB, the second end of tenth resistance R10 connects the ground terminal GND of keyboard KB by connector, second end of the EC1 in the tenth resistance R10 is able to detect that 0 potential, EC1 in this way can further notify user's successful connection on tablet computer PAD, based on same principle, keyboard KB also includes second pair of side apparatus detection circuit 56 in place, its effect is identical as first pair of side apparatus detection circuit 55 in place on tablet computer PAD, no longer It repeats.Specifically, the EC1 of PAD can push the prompt of PAD and KB successful connection on the display interface of PAD to user when PAD is connect with KB, the EC2 of KB, which can also drive, lights the corresponding indicator light prompt user KB of KB and PAD successful connection.
In addition, the first charging interface Ch1 further includes identity ID pin, and ID pin connects EC1 if the first charging interface Ch1 is USB interface；When OTG transfer connector is inserted into the first charging interface Ch1, EC1 determines that the first charging interface Ch1 has the insertion of OTG transfer connector according to the level of ID pin.And when the first charging interface Ch1 is inserted into OTG transfer connector, EC1 controls S1 and disconnects, and avoids and conflicts with the charger voltage of tablet computer PAD.
The structure of above-mentioned each switch (S1, S2, S3 and S4) is as shown in Figure 8, comprising: third metal-oxide-semiconductor M3, the 4th metal-oxide-semiconductor M4, twelfth resistor R12, thirteenth resistor R13 and third transistor Q3；
The first end of the drain electrode connection switch of third metal-oxide-semiconductor M3, the source electrode of third metal-oxide-semiconductor M3 connect the source electrode of the 4th metal-oxide-semiconductor M4, the second end of the drain electrode connection switch of the 4th metal-oxide-semiconductor M4；
The source electrode of third metal-oxide-semiconductor M3 is also connected with the first end of twelfth resistor R12, grid, the grid of the 4th metal-oxide-semiconductor M4 and the first end of thirteenth resistor R13 of the second end connection third metal-oxide-semiconductor M3 of twelfth resistor R12；The collector of the second end connection third transistor Q3 of thirteenth resistor R13, the emitter of the control terminal of the base stage connection switch of third transistor Q3, third transistor Q3 connect ground terminal GND.If upper switch is back to back structure, it is therefore prevented that the reverse irrigation of electric current.
In addition, tablet computer PAD further includes the first current-limiting circuit 57, as shown in Figure 10, the input terminal of the current limliting pin connection current-limiting circuit of the first charging circuit CI1, the control terminal of the first current-limiting circuit 57 connects EC1；EC1 determines the charge power of the first battery Ba1 and the charge power of the second battery Ba2 according to the electricity of the first battery Ba1 and the electricity of the second battery Ba2, first electronic controller EC1 controls the electric current of the current limliting pin of the first charging circuit CI1 according to the charge power of the first battery Ba1 by the first current-limiting circuit 57, and the charge power of the second battery Ba2 is sent to keyboard KB, wherein the first charging circuit CI1 corresponding with the electric current of current limliting pin to the charge power of the first battery Ba1.First current-limiting circuit 57 includes: the 14th resistance R14, the 15th resistance R15, the 16th resistance R16 and the 4th triode Q4；The current limliting pin of the first end connection charging circuit 12 of 14th resistance R14, the second end of the 14th resistance R14 connect the collector of the 4th triode Q4；The current limliting pin of the first end connection charging circuit 12 of 15th resistance R15, the second end of the 15th resistance R15 connect ground terminal GND；The grid of 4th triode Q4 passes through the control terminal of the 16th the first current-limiting circuit of resistance R16 connection 57, and the emitter of the 4th triode Q4 connects ground terminal GND.Keyboard KB further includes the second current-limiting circuit, the input terminal of the current limliting pin connection current-limiting circuit of the second charging circuit CI2, the control terminal connection EC2 of the second current-limiting circuit；EC2 controls the electric current of the current limliting pin of the second charging circuit CI2 according to the charge power of EC1 the second battery Ba2 sent by the second current-limiting circuit, wherein the second charging circuit CI2 is corresponding with the electric current of current limliting pin to the charge power of the second battery Ba2.The specific structure of the second current-limiting circuit of keyboard KB is identical as the structure of the first current-limiting circuit 57 of tablet computer PAD, and which is not described herein again.
Wherein, the first charging circuit and/or the second charging circuit can use charger (charger) chip (its peripheral circuit attached drawing is not shown) of BQ24x9x series, and it includes current limliting pin ILIM (as shown in Figure 9).Wherein, by the resistance of control ILIM access, charging current is adjusted, makes charging circuit output current limiting, realizes dynamic power distribution, by taking keyboard KB is inserted into charger as an example, it is assumed that R14=354 Ω, R15=1.05k Ω, R16=1k Ω:
1) charger general power is 10W, when the first accumulator electric-quantity of tablet computer PAD is lower, and when the charger of keyboard KB charges to the first battery of tablet computer PAD, Q4 pipe disconnects, the resistance R=1.05K of ILIM access, setting charging current limiter are 500mA, voltage 5V, power 2.5W, i.e. distribution 7.5W charge to the first battery of tablet computer.2) when keyboard KB does not give tablet computer PAD to charge, the conducting of Q4 pipe, R=265 Ω, when current limliting is 2A, keyboard KB is used alone 10W power and charges to the second battery of keyboard.Similar, if tablet computer PAD is inserted into charger, it can be the power charging of itself distribution 7.5W based on above-mentioned similar principle, the power charging of 2.5W is distributed for keyboard KB.
In addition, in one embodiment, tablet computer PAD further includes the first display module 58；When first electronic controller EC1 determines that the first battery is in charged state, it controls the first display module 58 and shows that tablet computer PAD is in the mark of charged state, when first electronic controller EC1 determines that the first battery is in power supply state, the first display module 58 of control shows that PAD is in the mark of power supply state；When first electronic controller EC1 determines that the second battery is in charged state, it controls the first display module 58 and shows that keyboard KB is in the mark of charged state, when first electronic controller EC1 determines that the second battery is in power supply state, the first display module 58 of control shows that keyboard KB is in the mark of power supply state.According to above-mentioned charging modes, tablet computer PAD shows the mark of tablet computer PAD and keyboard KB charged state by the first display module 58 (such as on screen)；As figs 11-13.
Wherein, as shown in figure 11, when the second battery is that the first battery charges, tablet computer PAD can show that tablet computer PAD is in mark B1, the keyboard KB of charged state and is in the mark B2 of power supply state on the status bar of screen, wherein display B1 and B2 profile can difference to distinguish tablet computer PAD and keyboard KB.
As shown in figure 12, when the first battery is that the second battery charges, tablet computer PAD can show that tablet computer PAD is in mark B11, the keyboard KB of power supply state and is in the mark B22 of charged state on the status bar of screen, wherein display B11 and B22 profile can difference to distinguish tablet computer PAD and keyboard KB.
As shown in figure 13, when the charger that first charging interface is connected is the first battery and the charging of the second battery, tablet computer PAD can show that tablet computer PAD is in mark B1, the keyboard KB of charged state and is in the mark B22 of charged state on the status bar of screen, wherein display B1 and B22 profile can difference to distinguish tablet computer PAD and keyboard KB.As shown in figure 13, when the charger that first charging interface is connected is the first battery and the charging of the second battery, tablet computer PAD can show that tablet computer PAD is in mark B1, the keyboard KB of charged state and is in the mark B22 of charged state on the status bar of screen, wherein display B1 and B22 profile can difference to distinguish tablet computer PAD and keyboard KB.As shown in figure 13, the charger that first charging interface is connected is the charging of the first battery, and when the charger that the second charging interface is connected is that the second battery charges, tablet computer PAD can show that tablet computer PAD is in mark B1, the keyboard KB of charged state and is in the mark B22 of charged state on the status bar of screen, wherein display B1 and B22 profile can difference to distinguish tablet computer PAD and keyboard KB.
In addition, in one embodiment, keyboard KB further includes the second display module 59；When second electronic controller EC2 determines that the first battery is in charged state, it controls the second display module 59 and shows that tablet computer PAD is in the mark of charged state, when second electronic controller EC2 determines that the first battery is in power supply state, the second display module 59 of control shows that tablet computer PAD is in the mark of power supply state；When second electronic controller EC2 determines that the second battery is in charged state, it controls the second display module 59 and shows that keyboard KB is in the mark of charged state, when second electronic controller EC2 determines that the second battery is in power supply state, the second display module 59 of control shows that keyboard KB is in the mark of power supply state.The peripheral equipments such as certain keyboard KB are usually lower-cost product, If it includes when screen for displaying images, the power supply state or charged state of screen display tablet computer PAD and keyboard KB can be passed through such as tablet computer PAD, if keyboard KB does not include screen for displaying images, the power supply state or charged state of tablet computer PAD and keyboard KB can be then identified by the indicator light of different location on the indicator light or keyboard of different colours.
Mobile terminal and peripheral equipment based on above-mentioned offer, embodiments herein provide a kind of charge control method, include the following steps:
101, mobile terminal determines charging modes according to the electricity of the electricity of the first battery of mobile terminal and the second battery of peripheral equipment.
Step 101 specifically includes: mobile terminal determines that the electricity of the first battery of mobile terminal is lower and is lower than third threshold value, it is determined that charging modes are that the second battery is the charging of the first battery；Alternatively, mobile terminal determines that the electricity of the second battery of peripheral equipment is lower and is lower than the 4th threshold value, it is determined that charging modes are that the first battery is the charging of the second battery.Charging modes include: that the second battery charging that the first battery is peripheral equipment or the second battery charge for the first battery.
When the first battery is that the second battery charges, if mobile terminal determines that the electricity of the first battery is lower than the 5th threshold value, mobile terminal controls second switch and disconnects, and peripheral equipment sends stopping charge control instruction outward.Peripheral equipment receives the stopping charge control instruction that mobile terminal is sent, and disconnects according to the 4th switch of charge control instruction control is stopped.
When the second battery is that the first battery charges, if mobile terminal determines that the electricity of the second battery is lower than the 6th threshold value, mobile terminal controls second switch and disconnects, and peripheral equipment sends stopping power supply control instruction outward.Peripheral equipment receives the stopping power supply control instruction that mobile terminal is sent, and disconnects according to the 4th switch of power supply control instruction control is stopped.
When the charging interface of the first charging interface of mobile terminal and/or peripheral equipment is connected to charger, determination method about charging modes, further includes: mobile terminal determines whether the first charging interface has charger connection according to the sampled voltage of the first charging interface of mobile terminal；When mobile terminal determines that the first charging interface of mobile terminal has charger to connect and/or the second charging interface of peripheral equipment has charger connection, redefine charging modes, charging modes further include: the charger of the first charging interface connection is that the first battery and the second battery charge, or it is the charging of the second battery that the charger of the second charging interface connection of peripheral equipment, which is the charger that the first battery and the second charging interface connect for the charger of the first battery and the charging of the second battery or the connection of the first charging interface,.
In addition, the charger in the connection of the first charging interface is the first battery and the second battery charges or the charger of the second charging interface connection is in the first battery and the second battery charging charging process；Further include: mobile terminal is according to the electricity of the electricity of the first battery of mobile terminal and the second battery of peripheral equipment, it determines the charge power of the first battery and the charge power of the second battery, and the charge power of the second battery is sent to peripheral equipment.Peripheral equipment carries out charge power control according to the charge power of the second battery.
102, mobile terminal controls the state of first switch and the second switch according to charging modes, and peripheral equipment sends control information with outside peripheral equipment notice charging modes outward.
103, the control information that peripheral equipment is sent according to mobile terminal determines charging modes.
104, peripheral equipment controls the state of third switch and the 4th switch according to charging modes, and charging modes include: that the second battery is that the first battery charges or the first battery is the charging of the second battery.
When the charging interface of the first charging interface of mobile terminal and/or peripheral equipment is connected to charger, determination method about charging modes, charging modes further include: the charger of the first charging interface connection is that the first battery and the second battery charge, or it is the charging of the second battery that the charger of the second charging interface connection of peripheral equipment, which is the charger that the first battery and the second charging interface connect for the charger of the first battery and the charging of the second battery or the connection of the first charging interface,.
In above method embodiment, mobile terminal controls the state of first switch and the second switch according to charging modes and peripheral equipment controls the description that third switchs the state reference Installation practice switched with the 4th according to charging modes, and which is not described herein again.
In one embodiment, when mobile terminal determines that the first battery is in charged state, display mobile terminal is in the mark of charged state, and when mobile terminal determines that the first battery is in power supply state, display mobile terminal is in the mark of power supply state；When mobile terminal determines that the second battery is in charged state, display peripheral equipment is in the mark of charged state, and when mobile terminal determines that the second battery is in power supply state, display peripheral equipment is in the mark of power supply state.
When peripheral equipment determines that the first battery is in charged state, display mobile terminal is in the mark of charged state, and when peripheral equipment determines that the first battery is in power supply state, display mobile terminal is in the mark of power supply state；When peripheral equipment determines that the second battery is in charged state, display peripheral equipment is in the mark of charged state, and when peripheral equipment determines that the second battery is in power supply state, display peripheral equipment is in the mark of power supply state.
Wherein, which is not described herein again for the description in technical effect reference unit embodiment that each section is realized in above method embodiment.
Specifically, the structure and charging method of tablet computer PAD and keyboard KB with reference to above-mentioned offer, embodiments herein provide a kind of specific charging control logic:
When the EC1 of tablet computer PAD control priority is higher, a kind of process of charging control logic is provided:
Firstly, the EC1 of tablet computer PAD is that zero potential confirms that keyboard KB is in place by the second end of the tenth resistance R10 of detection opposite side electronic equipment detection circuit in place when tablet computer PAD is connect with keyboard KB by hardware connector；The EC2 of keyboard KB is that zero potential confirms that tablet computer PAD is in place, and reports the EC1 of tablet computer by the second end of the tenth resistance R10 of detection opposite side electronic equipment detection circuit in place.Then, the EC1 of tablet computer PAD detects the electricity of the first battery Ba1 by the first charging circuit CI1, the EC2 of keyboard KB detects the electricity of the second battery Ba2 by the second charging circuit CI2, the EC1 of tablet computer PAD is communicated in a manner of USB with the EC2 of keyboard KB, the EC2 that the EC1 of tablet computer PAD obtains keyboard KB detects the electricity of the second battery Ba2,4, EC1 carries out charge control referring to Fig.1:
S01, determine whether the electricity of the first battery Ba1 of tablet computer is lower than first threshold, if so then execute S02, if otherwise executing S04.The first threshold is configurable to arbitrary value, usually takes a lower value, such as 5% certainly, it is intended that when determining that tablet computer remaining capacity is less, charge to tablet computer.
S02, determine whether the charger of tablet computer is in place, if otherwise executing S05, if so then execute S03.
Tablet computer concrete mode whether in place is determined in step S02, and referring to above description, which is not described herein again.
S03, the charger for controlling tablet computer charge to the Ba1 of tablet computer and the Ba2 of keyboard, until the two is full of.
At this point, using above-mentioned scheme one: the first of the EC1 control tablet computer PAD of tablet computer PAD opens Close S1 and second switch S2 closure, the 4th switch S4 of the EC2 control keyboard KB of keyboard KB is closed, the third switch S3 of the EC2 control keyboard KB of keyboard KB is disconnected, and the charger of tablet computer is respectively that the Ba1 of tablet computer and the Ba2 of keyboard charge by following two paths:
The path 1 of charging are as follows: the first battery Ba1 of the first charging circuit CI1- > tablet computer PAD of first switch S1- > tablet computer PAD of charger -> tablet computer PAD USB interface -> tablet computer PAD；
The path 2 of charging are as follows: the second battery Ba2 of the 4th switch S4- of second switch S2- > keyboard KB > keyboard KB the second charging circuit Ch2- > keyboard KB of first switch S1- > tablet computer PAD of charger -> tablet computer PAD USB interface -> tablet computer PAD.
It certainly, during the charging process can be tablet computer and the charge power that keypad assignments charge to battery by current-limiting circuit.
S04, determine whether the Ba2 electricity of keyboard is lower than second threshold, if so then execute S05, if otherwise executing S10.The second threshold is configurable to arbitrary value, usually takes a lower value, such as 5% certainly, it is intended that when determining that the Ba2 remaining capacity of keyboard is less, charge to keyboard.
S05, determine whether the charger of keyboard is in place, if so then execute S06, if otherwise executing S07.
S06, control keyboard charger to tablet computer Ba1 and keyboard Ba2 charge, until both be full of.
At this time, using above-mentioned scheme two: the second switch S2 closure of the EC1 control tablet computer PAD of tablet computer PAD, the first switch S1 of the EC1 control tablet computer PAD of tablet computer PAD is disconnected, the third switch S3 and the 4th switch S4 of the EC2 control keyboard KB of keyboard KB is closed, and the charger of keyboard is respectively that the Ba1 of tablet computer and the Ba2 of keyboard charge by following two paths:
The path 1 of charging are as follows: the second battery Ba2 of charger -> keyboard KB USB interface -> keyboard KB third switch S3- > keyboard KB the second charging circuit Ch2- > keyboard KB；
The path 2 of charging are as follows: the first battery Ba1 of the first charging circuit Ch1- > tablet computer PAD of second switch S2- > tablet computer PAD of charger -> keyboard KB USB interface -> keyboard KB third switch S3- > keyboard KB the 4th switch S4- > tablet computer PAD.
It certainly, during the charging process can be tablet computer and the charge power that keypad assignments charge to battery by the current-limiting circuit of keyboard.
S07, determine whether the charger of tablet computer is in place, if otherwise executing S09, if so then execute S08.
S08, the charger for controlling tablet computer charge to the Ba1 of tablet computer and the Ba2 of keyboard, until the two is full of.
S09, if it is determined that the Ba1 of tablet computer electricity be higher than keyboard Ba2 electricity, then control tablet computer Ba1 be keyboard Ba2 charge；If it is determined that the electricity of the Ba2 of keyboard is higher than the electricity of the Ba1 of tablet computer, then the Ba2 of control keyboard is that the Ba1 of tablet computer charges.And step S01 is continued to execute during S09.
Wherein, the Ba1 of tablet computer be keyboard Ba2 charging or keyboard Ba2 be tablet computer Ba1 charging process referring in particular to the description of above-described embodiment, which is not described herein again.
S10, determine whether the charger of keyboard is in place, if so then execute S11, if otherwise executing S01.
S11, determine whether the charger of tablet computer is in place, if otherwise executing S06, if so then execute S03.
Certainly a kind of above only control logic; the above control logic is that the basic function of each structure of the equipment provided based on embodiments herein is realized, other control logics that can be realized according to equipment provided by the embodiments of the present application are also the protection scope that the application should belong to certainly.
More than; the only specific embodiment of the application, but the protection scope of the application is not limited thereto, and anyone skilled in the art is within the technical scope of the present application; it can easily think of the change or the replacement, should all cover within the scope of protection of this application.Therefore, the protection scope of the application should be subject to the protection scope in claims.

Claims (33)

  1. A kind of mobile terminal characterized by comprising first switch, second switch, the first charging interface, the first charging circuit, the first connector, the first battery and the first electronic controller；
    The first end of the first switch connects first charging interface, and the second end of the first switch connects the first end of first charging circuit；
    The first end of the second switch connects the first end of first charging circuit, and the second end of the second switch connects first connector；
    The second end of first charging circuit is connect with first battery, for controlling the charging process of first battery；
    First connector is for connecting peripheral equipment；
    First electronic controller is connect with the control terminal of the control terminal of the first switch and the second switch, and with the peripheral communications；
    The electricity that first electronic controller is used for the second battery of the electricity and peripheral equipment according to first battery determines charging modes, the state of the first switch and the second switch is controlled according to the charging modes, and control information is sent to notify the charging modes to the peripheral equipment to the peripheral equipment, the charging modes include: that first battery is that second battery charges or second battery is first battery charging.
  2. Mobile terminal according to claim 1, which is characterized in that the mobile terminal further include: the first dead zone function circuit and the first low pressure difference linear voltage regulator,
    The first input end of the first dead zone function circuit is connected to first charging interface, and the output end of the first dead zone function circuit connects first electronic controller；The input terminal of first low pressure difference linear voltage regulator connects the third end of first charging circuit, the second input terminal of the first dead zone function circuit described in the output end of first low pressure difference linear voltage regulator；
    When the electricity of first battery is less than or equal to first threshold, and when first charging interface connection charger, the charger that first charging interface is connected is powered by the first dead zone function circuit to first electronic controller；
    When the electricity of first battery is greater than first threshold, first battery is powered by first charging circuit to first low pressure difference linear voltage regulator, and first low pressure difference linear voltage regulator is powered by the first dead zone function circuit to first electronic controller.
  3. Mobile terminal according to claim 2, it is characterized in that, the first dead zone function circuit includes: buck converter BUCK circuit, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first triode, the second triode, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor；
    Wherein, the input terminal of the BUCK circuit connects the first input end of the first dead zone function circuit, the first end of the first resistor connects the first input end of the first dead zone function circuit, the second end of the first resistor connects the enabled end EN of the BUCK circuit, and the second end of the first resistor also connects ground terminal by the second resistance；
    The end EN of the BUCK circuit is also connected with the collector of first triode, and the emitter of first triode connects ground terminal, the first end of the base stage connection 3rd resistor of first triode, the third electricity The second end of resistance connects the second input terminal of the first dead zone function circuit, and the second end of the 3rd resistor is also connected with the first end of the 4th resistance；
    The output end of the BUCK circuit connects the drain electrode of first metal-oxide-semiconductor, the source electrode of first metal-oxide-semiconductor connects the source electrode of the second metal-oxide-semiconductor, the grid of first metal-oxide-semiconductor connects ground terminal by the 5th resistance, and the second end of the 4th resistance is also connected with the grid of first metal-oxide-semiconductor；
    The source electrode of second metal-oxide-semiconductor connects the grid of second metal-oxide-semiconductor by the 6th resistance, the source electrode of second metal-oxide-semiconductor connects the output end of the first dead zone function circuit, the grid of second metal-oxide-semiconductor is also connected with the collector of second triode, the drain electrode of second metal-oxide-semiconductor connects the second input terminal of the first dead zone function circuit, and the base stage of second triode connects the second input terminal of the first dead zone function circuit by the 7th resistance.
  4. Mobile terminal according to claim 3, which is characterized in that further include the first Schottky diode and the second Schottky diode；
    Wherein, the anode of first Schottky diode connects first charging interface, and the cathode of first Schottky diode connects the cathode of second Schottky diode, and the anode of second Schottky diode connects the second end of the second switch；
    The cathode of first Schottky diode is also connected with the first input end of the first dead zone function circuit.
  5. Mobile terminal according to claim 1, which is characterized in that the mobile terminal further includes charger detection circuit in place, and the charger detection circuit in place connects first charging interface and first electronic controller；
    Wherein, charger detection circuit in place is used to obtain the sampled voltage of first charging interface, and first electronic controller is used to determine whether first charging interface has charger connection according to the sampled voltage；
    When first electronic controller determines that first charging interface has charger to connect and/or the second charging interface of the peripheral equipment has charger connection, first electronic controller is also used to redefine the charging modes, the charging modes further include: the charger of the first charging interface connection is that first battery and second battery charge, or the charger of the second charging interface connection is that first battery and second battery charge, or it is the second battery charging that the charger of the first charging interface connection, which is the charger that first battery and second charging interface connect,.
  6. Mobile terminal according to claim 5, which is characterized in that the charger detection circuit in place includes the 8th resistance and the 9th resistance；
    The first end of 8th resistance connects first charging interface, and the second end of the 8th resistance connects the first end of the 9th resistance, and the second end of the 9th resistance connects ground terminal；The first end of 9th resistance connects first electronic controller；
    First electronic controller is used to obtain the sampled voltage of the first end of the 9th resistance, and determines whether the charging interface has charger connection according to the sampled voltage.
  7. Mobile terminal according to claim 1, which is characterized in that the mobile terminal further includes to side apparatus detection circuit in place；It is described that first electronic controller and the second connector are connected to side apparatus detection circuit in place；Second connector is for connecting the ground terminal to side apparatus；
    When second connector connects the ground terminal to side apparatus, first electronic controller according to The level of second connector determines described in place to side apparatus.
  8. Mobile terminal according to claim 7, which is characterized in that
    Described includes the tenth resistance and eleventh resistor to side apparatus detection circuit in place；
    The power supply of the first end connection scheduled voltage of tenth resistance, the first end of the second end connection eleventh resistor of the tenth resistance, the second end of the eleventh resistor connect ground terminal；The second end of tenth resistance is also connected with first electronic controller and second connector.
  9. Mobile terminal according to claim 1, which is characterized in that first charging interface is USB interface, and first charging interface includes identity ID pin, and the ID pin connects first electronic controller；When OTG transfer connector is inserted into the charging interface, first electronic controller is used to determine whether first charging interface has the insertion of OTG transfer connector according to the level of the ID pin.
  10. Mobile terminal according to claim 1, which is characterized in that the first switch and/or second switch include: third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, twelfth resistor, thirteenth resistor and third transistor；
    The source electrode of the third metal-oxide-semiconductor connects the source electrode of the 4th metal-oxide-semiconductor；The source electrode of the third metal-oxide-semiconductor is also connected with the first end of the twelfth resistor, and the second end of the twelfth resistor connects the grid, the grid of the 4th metal-oxide-semiconductor and the first end of the thirteenth resistor of the third metal-oxide-semiconductor；The second end of the thirteenth resistor connects the collector of the third transistor, and the emitter of the third transistor connects ground terminal；
    When the third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the twelfth resistor, the thirteenth resistor and third transistor composition first switch, the drain electrode of the third metal-oxide-semiconductor connects the first end of the first switch, the drain electrode of 4th metal-oxide-semiconductor connects the second end of the first switch, and the base stage of the third transistor connects the control terminal of the first switch；
    When the third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the twelfth resistor, the thirteenth resistor and third transistor composition second switch, the drain electrode of the third metal-oxide-semiconductor connects the first end of the second switch, the drain electrode of 4th metal-oxide-semiconductor connects the second end of the second switch, and the base stage of the third transistor connects the control terminal of the second switch.
  11. Mobile terminal according to claim 5, which is characterized in that further include current-limiting circuit, the input terminal of the current limliting pin connection current-limiting circuit of first charging circuit, the control terminal of the current-limiting circuit connects first electronic controller；First electronic controller determines the charge power of first battery and the charge power of the second battery according to the electricity of first battery and the electricity of second battery, first electronic controller controls the electric current of the current limliting pin of first charging circuit according to the charge power of first battery by the current-limiting circuit, and the charge power of second battery is sent to the peripheral equipment, wherein first charging circuit is corresponding with the electric current of the current limliting pin to the charge power of the first battery.
  12. Mobile terminal according to claim 11, which is characterized in that the current-limiting circuit includes: the 14th resistance, the 15th resistance, the 16th resistance and the 4th triode；
    The first end of 14th resistance connects the current limliting pin of first charging circuit, and the second end of the 14th resistance connects the collector of the 4th triode；
    The first end of 15th resistance connects the current limliting pin of first charging circuit, and the second end of the 15th resistance connects ground terminal；
    The grid of 4th triode connects the control terminal of the current-limiting circuit by the 16th resistance, and described The emitter of four triodes connects ground terminal.
  13. - 12 described in any item mobile terminals according to claim 1, which is characterized in that further include the first display module；
    When first electronic controller determines that first battery is in charged state, it controls first display module and shows that the mobile terminal is in the mark of charged state, when first electronic controller determines that first battery is in power supply state, controls first display module and show that the mobile terminal is in the mark of power supply state；When first electronic controller determines that second battery is in charged state, it controls first display module and shows that the peripheral equipment is in the mark of charged state, when first electronic controller determines that second battery is in power supply state, controls first display module and show that the peripheral equipment is in the mark of power supply state.
  14. - 12 described in any item mobile terminals according to claim 1, which is characterized in that
    First electronic controller is specifically used for determining that the electricity of the first battery of the mobile terminal is lower and is lower than third threshold value, it is determined that charging modes are that second battery is the first battery charging；First electronic controller is specifically used for determining that the electricity of the second battery of the peripheral equipment is lower and is lower than the 4th threshold value, it is determined that charging modes are that first battery is the second battery charging.
  15. Mobile terminal according to claim 14, it is characterized in that, when first battery is that second battery charges, if first electronic controller determines the electricity of first battery lower than the 5th threshold value, then first electronic controller is disconnected for controlling the second switch, and is sent to the peripheral equipment and stopped charge control instruction.
  16. Mobile terminal according to claim 14, it is characterized in that, when second battery is that first battery charges, if first electronic controller determines the electricity of second battery lower than the 6th threshold value, then first electronic controller is disconnected for controlling the second switch, and is sent to the peripheral equipment and stopped power supply control instruction.
  17. - 16 described in any item mobile terminals according to claim 1, which is characterized in that first connector is pogo pin spring ejector pin connector.
  18. A kind of peripheral equipment, which is characterized in that including third switch, the 4th switch, the second charging interface, the second charging circuit, third connector, the second battery and the second electronic controller；
    The first end of the third switch connects second charging interface, the first end of the second end connection and second charging circuit of the third switch；
    The first end of 4th switch connects the first end of second charging circuit, and the second end of the 4th switch connects the third connector；
    The second end of second charging circuit is connect with second battery, for controlling the charging process of second battery；
    The third connector is for connecting mobile terminal；
    The control terminal of control terminal and the 4th switch that second electronic controller and the third switch is connect, and with the communication of mobile terminal；
    Second electronic controller is used to determine charging modes according to the control information that the mobile terminal is sent, and the state of the third switch and the 4th switch is controlled according to the charging modes, the charging modes include: that second battery is that first battery charges or first battery is second electric power storage Pond charging.
  19. Peripheral equipment according to claim 18, which is characterized in that the peripheral equipment further include: the second dead zone function circuit and the second low pressure difference linear voltage regulator；
    The first input end of the second dead zone function circuit is connected to second charging interface, and the output end of the second dead zone function circuit connects second electronic controller；The input terminal of second low pressure difference linear voltage regulator connects the third end of second charging circuit, the second input terminal of the second dead zone function circuit described in the output end of second low pressure difference linear voltage regulator；
    When the electricity of second battery is less than or equal to second threshold, and when second charging interface connection charger, the charger that second charging interface is connected is powered by the second dead zone function circuit to second electronic controller；
    When the electricity of second battery is greater than second threshold, second battery is powered by second charging circuit to second low pressure difference linear voltage regulator, and second low pressure difference linear voltage regulator is powered by the second dead zone function circuit to second electronic controller.
  20. Peripheral equipment according to claim 18, which is characterized in that further include the second display module；
    When second electronic controller determines that first battery is in charged state, it controls second display module and shows that the mobile terminal is in the mark of charged state, when second electronic controller determines that first battery is in power supply state, controls second display module and show that the mobile terminal is in the mark of power supply state；When second electronic controller determines that second battery is in charged state, it controls second display module and shows that the peripheral equipment is in the mark of charged state, when second electronic controller determines that second battery is in power supply state, controls second display module and show that the peripheral equipment is in the mark of power supply state.
  21. Peripheral equipment according to claim 18, which is characterized in that second electronic controller is also used to receive the stopping charge control instruction of mobile terminal transmission, and is disconnected according to stopping charge control instruction control the 4th switch.
  22. Peripheral equipment according to claim 18, which is characterized in that second electronic controller is also used to receive the stopping power supply control instruction of mobile terminal transmission, and is disconnected according to stopping power supply control instruction control the 4th switch.
  23. A kind of charging method of such as described in any item mobile terminals of claim 1-17 characterized by comprising
    Mobile terminal determines charging modes according to the electricity of the electricity of the first battery of the mobile terminal and the second battery of peripheral equipment；
    The mobile terminal controls the state of first switch and the second switch according to the charging modes, and control information is sent to notify the charging modes to the peripheral equipment to the peripheral equipment, the charging modes include: that the second battery charging that first battery is the peripheral equipment or second battery charge for first battery.
  24. According to the method for claim 23, which is characterized in that the method also includes:
    The mobile terminal determines whether first charging interface has charger connection according to the sampled voltage of the first charging interface of the mobile terminal；
    The mobile terminal determines that the first charging interface of the mobile terminal has charger to connect and/or described outer When second charging interface of peripheral equipment has charger connection, redefine the charging modes, the charging modes further include: the charger of the first charging interface connection is that first battery and second battery charge, or it is the second battery charging that the charger of the second charging interface connection of the peripheral equipment, which is the charger that first battery and second charging interface connect for the charger of first battery and second battery charging or first charging interface connection,.
  25. According to the method for claim 24, which is characterized in that the method also includes:
    The mobile terminal is according to the electricity of the electricity of the first battery of the mobile terminal and the second battery of the peripheral equipment, it determines the charge power of first battery and the charge power of second battery, and the charge power of second battery is sent to the peripheral equipment.
  26. According to the described in any item methods of claim 23-25, which is characterized in that the method also includes:
    It when the mobile terminal determines that first battery is in charged state, shows that the mobile terminal is in the mark of charged state, when the mobile terminal determines that first battery is in power supply state, shows that the mobile terminal is in the mark of power supply state；It when the mobile terminal determines that second battery is in charged state, shows that the peripheral equipment is in the mark of charged state, when the mobile terminal determines that second battery is in power supply state, shows that the peripheral equipment is in the mark of power supply state.
  27. According to the method for claim 23, which is characterized in that the mobile terminal determines charging modes according to the electricity of the electricity of the first battery of the mobile terminal and the second battery of peripheral equipment, comprising:
    The mobile terminal determines that the electricity of the first battery of the mobile terminal is lower and is lower than third threshold value, it is determined that charging modes are that second battery is the first battery charging；Alternatively,
    The mobile terminal determines that the electricity of the second battery of the peripheral equipment is lower and is lower than the 4th threshold value, it is determined that charging modes are that first battery is the second battery charging.
  28. According to the method for claim 27, it is characterized in that, when first battery is that second battery charges, if the mobile terminal determines the electricity of first battery lower than the 5th threshold value, then the mobile terminal controls the second switch and disconnects, and sends to the peripheral equipment and stop charge control instruction.
  29. According to the method for claim 27, it is characterized in that, when second battery is that first battery charges, if the mobile terminal determines the electricity of second battery lower than the 6th threshold value, then the mobile terminal controls the second switch and disconnects, and sends to the peripheral equipment and stop power supply control instruction.
  30. A kind of charging method of such as described in any item peripheral equipments of claim 18-22 characterized by comprising
    The control information that the peripheral equipment is sent according to the mobile terminal determines charging modes；
    The peripheral equipment controls the state of the third switch and the 4th switch according to the charging modes, and the charging modes include: that second battery is that first battery charges or first battery is second battery charging.
  31. According to the method for claim 30, which is characterized in that
    It when the peripheral equipment determines that first battery is in charged state, shows that the mobile terminal is in the mark of charged state, when the peripheral equipment determines that first battery is in power supply state, shows that the mobile terminal is in the mark of power supply state；It when the peripheral equipment determines that second battery is in charged state, shows that the peripheral equipment is in the mark of charged state, when the peripheral equipment determines that second battery is in power supply state, shows that the peripheral equipment is in the mark of power supply state.
  32. According to the method for claim 30, which is characterized in that the peripheral equipment receives the stopping charge control instruction that mobile terminal is sent, and is disconnected according to stopping charge control instruction control the 4th switch.
  33. According to the method for claim 30, which is characterized in that the peripheral equipment receives the stopping power supply control instruction that mobile terminal is sent, and is disconnected according to stopping power supply control instruction control the 4th switch.
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